Abstract
The relationship between motorcycle steering and roll angles was clarified in this study. A simple mathematical model for a motorcycle was developed to analyze the dynamics of the motorcycle when turning at a roll angle. Equations of motion were used to derive an equation describing the steering angle as decided by the roll angle and running velocity. In addition, a treatment method for the large roll angle of a motorcycle was described. The large roll angle was assumed as a sum of the reference and small displacement angles. The proposed method allows simple expressions for treating large roll angles. Numerical analyses using real motorcycle specifications were performed. The results show the effectiveness of stability factors on actual steering angles.
